(19)

(11)

EP 4 540 177 A2

(12)

(88) Date of publication A3: 14.03.2024 (43) Date of publication: 23.04.2025 Bulletin 2025/17 (21) Application number: 23824883.5 (22) Date of filing: 16.06.2023

(51) International Patent Classification (IPC):  C01B 3/04(2006.01) C01B 3/50(2006.01) B01J 19/14(2006.01) (52) Cooperative Patent Classification (CPC): C01C 1/0405; B01D 53/8634; B01D 2256/16; B01D 2256/10; B01J 23/755; B01J 23/462; C01B 3/047; Y02E 60/36 (86) International application number: PCT/US2023/068638 (87) International publication number: WO 2023/245201 (21.12.2023 Gazette 2023/51)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 17.06.2022 US 202263353402 P (71) Applicant: Kellogg Brown & Root LLC Houston, Texas 77002 (US)	(72) Inventors: NGUYEN, Khoa, Dang Houston, TX 77002 (US) JAIN, Umesh Houston, TX 77002 (US) BRUNENGO, Paolo Houston, TX 77002 (US) STYLIANOU, Elena Houston, TX 77002 (US) KHURANA, Rohit Houston, TX 77002 (US) (74) Representative: Weickmann & Weickmann PartmbB  Postfach 860 820 81635 München 81635 München (DE)